(function (root, factory) {
  if (typeof module === 'object' && module.exports) {
    module.exports = factory(root);
    return;
  }

  root.UploadPages = factory(root);
  if (root.document) {
    root.document.addEventListener('DOMContentLoaded', function () {
      root.UploadPages.init();
    });
  }
})(typeof globalThis !== 'undefined' ? globalThis : window, function (root) {
  'use strict';

  var documentRef = root.document;

  function normalizeUploadResult(data) {
    var source = data || {};

    return {
      ossId: String(source.ossId || ''),
      fileName: source.fileName || source.originalName || '',
      url: source.url || ''
    };
  }

  function buildUploadStatus(fileName, ossId) {
    return (fileName || '文件') + ' 上传完成，OSS ID：' + ossId;
  }

  function getUploadMode() {
    // 本期只保留头像单文件上传，不再根据文件大小切换分片流程。
    return 'single';
  }

  function getApi() {
    return root.GenealogyApi && root.GenealogyApi.defaultClient;
  }

  function query(selector, rootNode) {
    return (rootNode || documentRef).querySelector(selector);
  }

  function showMessage(message) {
    if (root.layui && root.layui.layer) {
      root.layui.layer.msg(message);
      return;
    }

    if (root.alert) root.alert(message);
  }

  function uploadFileForPage(api, file) {
    // 上传结果仅用于回填资料表单中的 avatarOssId。
    if (!api || !file) return Promise.reject(new Error('请选择文件'));
    return api.uploadFile(file);
  }

  async function uploadFromInput(input) {
    var api = getApi();
    var file = input.files && input.files[0];
    var target = query(input.getAttribute('data-upload-target'));
    var status = query(input.getAttribute('data-upload-status'));
    var result;

    if (!api || !file || !target) return;
    input.disabled = true;

    try {
      result = normalizeUploadResult(await uploadFileForPage(api, file));
      if (!result.ossId) throw new Error('上传响应缺少 ossId');
      target.value = result.ossId;
      if (status) status.textContent = buildUploadStatus(result.fileName || file.name, result.ossId);
    } catch (error) {
      if (status) status.textContent = error.message || '上传失败';
      showMessage(error.message || '上传失败');
    } finally {
      input.disabled = false;
      input.value = '';
    }
  }

  function bindActions() {
    if (!documentRef) return;

    documentRef.addEventListener('change', function (event) {
      var input = event.target.closest('[data-upload-target]');

      if (!input || input.type !== 'file') return;
      uploadFromInput(input);
    });
  }

  function init() {
    bindActions();
  }

  return {
    normalizeUploadResult: normalizeUploadResult,
    buildUploadStatus: buildUploadStatus,
    getUploadMode: getUploadMode,
    uploadFileForPage: uploadFileForPage,
    init: init
  };
});